The hollow hold is an isometric exercise ... To progress the exercise further, hold a weight like an adjustable dumbbell or plate in both hands. Whether you choose hollow holds, hollow rocks ...
Isometric exercises involve holding muscle contractions ... which strengthens the heart and optimises circulation. It also supports weight management, which is a key factor in controlling blood ...
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One way barre achieves that intensity is through isometric exercises ... sliders, ankle weights, free weights, exercise balls, and more. But don’t let the fancy equipment fool you.